The dual zone A/C (CJ2) system provides a comfortable environment inside the passenger compartment regardless of the weather conditions outside of the vehicle. This system can automatically adjust and control temperature output, fan speed, air delivery mode, air conditioning operation and air intake. You can use the AUTO (automatic) setting or override the automatic operation with the manual control settings. The control settings will be remembered each time the vehicle is restarted without moving any of the HVAC control buttons/knobs. A Memory option is available which can store specific settings and then recall them at any time.

The dual zone A/C system is a vacuum and electrically controlled heating, ventilating and air conditioning system. Both electronic and vacuum circuits determine air intake and discharge locations. The electronic circuits control the following aspects of the system:

One of these modes is a fully automatic dual zone mode which determines the following conditions (set by the driver):

Press the AUTO button to place the entire system in the automatic mode. After a five second display of the current settings, only the word AUTO and the outside temperature will be shown on the digital display. The system will operate to achieve the set temperature as quickly as possible. If you have set the driver's temperature control at 16°C (60°F) or 32°C (90°F), the system will not operate automatically until a different temperature is selected. The AUTO control system works much more efficiently with the windows rolled up and the removable roof installed or the convertible top up.

The vehicle has been parked overnight in cold weather (below 0°C/32°F) and the driver has set the automatic temperature setting to 23°C (73°F). The system will automatically adjust the temperature output to maximum heating. The fan will start at low speed to avoid blowing cold air into the vehicle. The length of delay depends on the amount of time since the engine was last started, the outside temperature and the engine coolant temperature. As the coolant warms up, the fan speed will gradually increase. Air will flow to the floor with some air to the windshield to prevent fogging under most normal conditions.

As the interior of the vehicle warms up to the set temperature, the fan speed will decrease and the temperature output may become cooler. If the interior temperature continues to warm up due to heating from the sun or outside temperature increases, the system may switch to other air delivery modes (typically DEFOG or BI-LEVEL).

The vehicle has been parked all day in hot weather (above 21°C/70°F) and the driver has set the automatic temperature setting to 23°C (73°F). The system will automatically adjust the temperature output to maximum cooling. The fan will start at low speed momentarily to push the hot air to the floor of the vehicle and then go to a higher speed with cold airflow out of the instrument panel outlets. A small amount of airflow will continue through the lower air ducts to cool the floor area.

The air intake may start in the recirculated mode for maximum cooling performance. As the interior of the vehicle cools down to the set temperature, the fan speed will decrease and the temperature output may become warmer. The air intake may shift from recirculation to fresh air mode. If the interior temperature continues to cool down due to a decrease in the amount of heat the vehicle is absorbing from the sun or a decrease in the outside temperature, the system may switch to other air delivery modes (typically BI-LEVEL or DEFOG).

With the Dual Zone Electronic Climate Control, there are several settings which can be used to control the system and override the AUTO operation. Fan speed, air delivery mode, air intake mode, and air conditioning operation can be controlled by using the manual settings. The system will still determine the temperature output level based on the driver's temperature control knob and the passenger's offset control knob.